<?php


namespace app\middleware;


use Webman\Http\Request;
use Webman\Http\Response;
use Webman\MiddlewareInterface;

class OpenKuaYuMiddleware implements MiddlewareInterface
{
    public function process(Request $request,callable $handler) : Response
    {
        if (env('IS_ALLOW_ORIGIN',false)){
            // 如果是options请求则返回一个空响应，否则继续向洋葱芯穿越，并得到一个响应
            $response = $request->method() == 'OPTIONS' ? response('') : $handler($request);

            // 给响应添加跨域相关的http头
            $response->withHeaders([
                'Access-Control-Allow-Credentials' => 'true',
                'Access-Control-Allow-Origin' => $request->header('origin', '*'),
                'Access-Control-Allow-Methods' => $request->header('access-control-request-method', '*'),
                'Access-Control-Allow-Headers' => $request->header('access-control-request-headers', '*'),
            ]);

            return $response;
        }

    }
}